期刊
ADVANCED FUNCTIONAL MATERIALS
卷 32, 期 8, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202109271
关键词
conjugated polymer donors; polymer solar cells; pyrazine units; ternary random copolymerization; terpolymers
类别
资金
- National Key Research and Development Program of China - MOST [2019YFA0705900]
- Guangdong Major Project of Basic and Applied Basic Research [2019B030302007]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- ONR [N000142012155]
- NSFC [51820105003, 21734008, 61904181]
The study successfully synthesized three D-A(1)-D-A(2) type terpolymers using a random ternary copolymerization strategy, with PZ-T as the second A-unit, to improve the photovoltaic performance of polymer solar cell donors.
Recently, a random ternary copolymerization strategy has become a promising and efficient approach to develop high-performance polymer donors for polymer solar cells (PSCs). In this study, a low-cost electron-withdrawing unit, 2,5-bis(4-(2-ethylhexyl)thiophen-2-yl)pyrazine (PZ-T), is incorporated into the polymer backbone of PM6 as the third component, and three D-A(1)-D-A(2) type terpolymers PMZ-10, PMZ-20, and PMZ-30 are synthesized by the random copolymerization strategy, with the PZ-T proportion of 10%, 20%, and 30%, respectively. The terpolymers exhibit downshifted highest occupied molecular orbital energy levels than PM6, which is beneficial for obtaining higher open-circuit voltage (V-oc) of the PSCs with the polymer as a donor. Importantly, the PSCs based on PMZ-10:Y6 demonstrate efficient exciton dissociation, higher and balanced electron/hole mobilities, desirable aggregation, and high power conversion efficiency of 18.23%, which is the highest efficiency among the terpolymer-based PSCs so far. The results indicate that the ternary copolymerization strategy with PZ-T as the second A-unit is an efficient approach to further improve the photovoltaic performance and reduce the synthetic cost of the D-A copolymer donors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据